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What does a UIStackView allow?
Author: Smart&SoftStatus: PublishedQuestion passed 398 times
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1
Is the following code valid?
```
var x = 10
var y = x
```2
How to check if a variable is defined in Swift1
Use dispatch_once from Grand Central Dispatch,Declare the portion of code whose result is stored in a static let in Swift.1
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Swift: What is the output of the following code? `var x = 10; x = x + undefined; print(x)`1
What is the purpose of the required keyword in Swift?0
The mechanism that allows a class to subscribe to automatic notifications of value changes of an attribute of another class.